基于光伏发电的海岛建筑供电系统的研究

发布时间：2018-01-19 13:45

本文关键词： 海岛供电户用光伏系统最大功率点跟踪蓄电池充电能量协调控制经济环境评价　出处：《燕山大学》2014年硕士论文　论文类型：学位论文

【摘要】：长期以来，海岛居民用电保障都十分困难，大陆远距离送油发电是目前解决海岛供电问题的主要途径。但这种方式成本高，且易受外界因素制约。因此，依靠海岛自身条件来解决能源保障才是根本。近年来，随着国家发展战略转型以及可再生能源开发利用的优势日益突出，各种可再生能源的开发与利用规模空前宏大。太阳能无处不在，无论陆地、海洋或岛屿，更为宝贵的是它是最清洁的能源之一。因此太阳能光伏发电技术将成为解决海岛供电问题的有效方式。本文以海岛户用建筑为背景，对独立光伏供电系统的能量控制系统的控制策略及容量设计部分的关键问题展开研究，并进行经济和环境评价。本文介绍了光伏应用的背景及特点，对光伏发电系统进行简要概述，指出课题研究的意义和主要内容。构建户用直流母线式结构的独立光伏发电系统，对能量控制策略进行研究，包括采用改进的变步长扰动占空比的最大功率点跟踪控制策略来提高系统对太阳能的利用率；提出一种考虑最大功率点跟踪的蓄电池充电控制策略，保证直流母线电压的稳定；详细分析系统的工作模式，给出系统能量协调控制策略，实现各环节的稳定运行，并分别进行仿真验证。依据海口地区气象数据模拟海岛，，分析典型家庭的用电需求，研究系统的容量计算方法，给出系统的容量配置方案；依据系统的成本及成本回收期限给出经济评价，并对系统的CO2减排量及光伏系统减排CO2潜力两个指标给出环境评价。
[Abstract]:For a long time, it has been very difficult for island residents to use electricity, and long-distance oil and power generation in mainland is the main way to solve the problem of island power supply at present, but this way is expensive and easy to be restricted by external factors. In recent years, with the transformation of national development strategy and the advantages of renewable energy development and utilization, it is essential to rely on the island's own conditions to solve the problem of energy security. The development and utilization of all kinds of renewable energy is unprecedented. Solar energy is everywhere, whether on land, sea or island. More precious is that it is one of the cleanest energy, so solar photovoltaic power generation technology will become an effective way to solve the problem of power supply in islands. The key problems of the control strategy and capacity design of the energy control system of the independent photovoltaic power supply system are studied, and the economic and environmental evaluation are carried out. This paper introduces the background and characteristics of photovoltaic application, summarizes the photovoltaic power generation system, and points out the significance and main contents of the research. An independent photovoltaic power generation system with DC bus structure is constructed, and the energy control strategy is studied. The improved maximum power point tracking control strategy with variable step-size disturbance duty cycle is used to improve the utilization rate of solar energy. A charging control strategy considering maximum power point tracking is proposed to ensure the stability of DC bus voltage. The working mode of the system is analyzed in detail, and the coordinated control strategy of system energy is given to realize the stable operation of each link, and the simulation is carried out respectively. According to the meteorological data of Haikou area, this paper simulates the island, analyzes the electricity demand of typical families, studies the capacity calculation method of the system, and gives the system capacity configuration scheme. The economic evaluation is given according to the cost and cost recovery period of the system, and the environmental evaluation is given for the CO2 emission reduction of the system and the potential of the photovoltaic system to reduce the CO2 emissions.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU85;TM615

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